The DEL utility can be used to delete a particular line in the buffer.
DEL 命令可用于删除缓冲区中的某一行。
For example operations like TextSelection.Delete don't directly delete text from the buffer.
例如，像TextSelection . Delete这样的操作不直接从缓冲区删除文本。
Slip up on the backspace key to delete all chars in buffer.
删除键向上滑动删除所谓未上屏字符。
Slip up on the backspace key to delete all chars in buffer.
删除键向上滑动删除所谓未上屏字符。
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